Change animation frames (#3627)

## Description
- Changes animation frames to be smaller
- Cleans up file names and popup logic

## tests
- Passes local CI

codex-rs/tui/frames/codex/frame_24.txt

@@ -0,0 +1,17 @@
+                                      
+             exedcccddoe              
+          oceocxeexddcoecc            
+        occdeoccx oedcxcco e          
+       ocooooxdoeexoe ecexeec         
+      o ooeoo    eccoeexeeexoc        
+      xoecee       cooo oxd oce       
+     x  xx       ooeoocoeexeexe       
+     x exx       xodoeexxeooexx       
+     xo xddddccxxxccecoex x  xx       
+      e o  cxoooddooxoeeccx xcx       
+      e cexeccccccce eoocexdooe       
+       e eoce           x codo        
+        eoceexo      edceodec         
+          oocoeecxxddddxeeoe          
+            cdeccdeeeddcc             
+